On 11.08.08 09:30, Dennis Peterson wrote:
> There are some big names that play badly with greylisting. They play
> badly with greet-pause, too. A problem I've seen with greylisting is the
> round-robin MTA pool. Each is told in turn to come back later and if the
> pool is large it can take a long time to cycle through all of them. You
> have to be careful how you screen the addresses.

DCC servers (rhyolite.net) have greylisting functionality built-in, and they
are accessible through network. Such solution (or other that shares
grelylisting DB) should prevent from some problems. Of course, servers with
big queues that process mail with longer periods may cause such delays.

This is a thing anybody who implements greylisting should know. I plan to
implement greylisting on secondary MXes first - bigger delay there should
not be a problem (and could even help in catching spam, this and other ways) 

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